Method and apparatus for producing wooden wall coverings



Aug. 27, 1935. o. REIMANN METHOD AND APPARATUS FOR PRODUCING WOODEN WALLCOVERINGS Filed June 2, 1951 SSheets-Sheet 1 III 1/! I III/III Allg-1935. o. REIMANN 2,Ii2,403

METHOD AND APPARATUS FOR PRODUCING WOODEN WALL COVERINGS Filed June 2,1931 3 Sheets-Sheet 2 I I ----------i:-u

- nveuf'o t, 04 60 Rea m awn ,Aug. 27, 1935. o. REIMANN 2,012,403

METHOD AND APPARATUS FOR PRODUCING WOODEN WALL COVERINGS Filed June 2,1931 3 Sheets-Sheet 3 I 3110011? fi'o Rmmamt Patented Aug. 27, 1935PATENT OFFICE METHOD AND APPARATUS FOR PRODUCING WOODEN WALL COVERINGSOtto Reimann, Berlin-Charlottenburg, Germany Application June 2, 1931,Serial No. 541,728

8 Claims.

In the known methods of and apparatus for producing wooden wallcoverings or veneers the 4 device supplying the adhesive is arranged inthe 'quality of the product derived.

The subject matter of this invention is a method of producing woodenwall coverings or facings, in which the backing, after the applica-.tion of the adhesive, is guided freely for a certain distance conformingwith the nature of the adhesive employed, then united under pressurewith the veneer taken from a roller, and after the connection the twowebs or sheets are warmed, dried and if necessary cooled, to then, afteracquiring the moist condition necessary for further operations (10-20%),be passed through a set of rollers and wound under tension in roll form.The adhesive may be applied to the backing either in the form of gluefoil or in a liquid state. The drying of the wooden wall covering ispreferably performed by means of a drying cylinder, which is adjustableas regards its spacing from 'the point where the two webs are united,whereby a snug adaptation of the wooden covering to the drying cylinderis ensured by an endless, pervious cloth, screen or band exerting acounter-pressure.

An apparatus for carrying out the method according to the invention isillustrated, by way example, in the accompanying drawings.

Fig. 1 is a view showing the apparatus in elevation.

Fig. 2 is a plan view of the same apparatus.

Fig. 3 is an end view and Fig. 4 is-a front view showing the dryingdevice and the metal cloth for pressing the wooden wall covering againstthe drying cylinder. I

Fig. 5 is a plan view of a woodenwall covering showing the superimposedelements thereof.

In the arrangement shown the backing, for example paper, is wound on aroller I, which is mounted in the frame 2 of a gluing device. The latterconsists of a container 3, which is borne by the frame, and the bottomof which is constituted by two rollers 4, 5, the spacing between theserollers beifig adjustable as desired by means of a micrometer screw orthe like for regulating the size of the gap.

After leaving the gluing device the web of paper is then conductedaround a. part of the periphery of the roller 5 and over a roller 6, tobe 5 thereupon united with the veneer. The frame of I theadhesive-applying apparatus rests with rollers 1 on rails '8 and is madeto be movable in a well known way as by means of a screw threaded rod l8rotatably mounted in supports I9, 20 and 10 rotatable by a hand wheel2!, so that the distance of the adhesive-applying device from the pairof rollers 9, l0 uniting the web of paper with the veneer may beadjusted as desired. For instance, to effect adjustment of the adhesiveapplying device relative to the support the thread on the rod l8 mayengage the teeth of a gear or worm wheel 22 rotatably carried by theframe 2 and a second gear fixed to and rotatable with' the worm wheelmeshing with and ro- 20 tating toothed wheels or pinions fixed on theaxles or shafts of the rollers l. The roller I0 is furnished with arubber facing and presses against the roller 9. A preferably-bulgedroller H ensures a proper spreading and an even ten- 25 sion of the webof paper or fabric coated with the adhesive.

The moist veneer is wound upon a preferably braked roller I 2 mounted inthe frame, and is withdrawn from the roller under tension by the rollers9 and i 0 and united under pressure with the web of paper. The whole,after its exit from the rollers 5 and i0, is thereupon conductedpractically tangentially to a movable drying cylinder H, which issupported by means of two pairs of rollers rotatably mounted upon acarriage adjustable relative to the frame 20 carrying the unitingrollers 9, l0 and adapted to be retained in adjusted position by wedgeblocks or the like, as shown in Figure 1. The wood veneer preferablycovers the whole surface of the drying cylinder as indicated in dash anddot line in Figure 1. 'When employing a liquid adhesive the requisitepressure for pressing the wooden coveringand paper web against thedrying cylinder is obtained by reason of the pull exerted by a set ofrolls i6. I

By corresponding heating of the movable drying cylinder as by varyingthe number of the heating elements 24 it is possible to vary the per- 60centage of moisture oi the wood covering as desired. The adjustabilityof the distance between the adhesive-applying device and the point wherethe web of paper is united with the veneer also permits a free guidingof the web of paper coated may be situated above the web of paper forthe by means of a belt purpose of more rapidly attaining the desiredtacky condition of the adhesive that must be tacky enough for preventingthe moist veneer from being displaced upon the backing, when beingunited with the latter. Since neither the moisture of the adhesive, northe moisture of the veneer is always uniform, the regulation of thetacky condition of the adhesive provided on the backing is veryimportant for the riroduction of a good, smooth wooden wall covering.The

adjustment of the drying cylinder in its distance from the point ofconnection of the two sheets prevents excessive sag and possibly alsotearing of the united layers, the thickness and weight of which mayconsiderably vary.

After emerging from the drying device heated by gas, steam, hot air orelectricity the wooden covering, which in the meantime has been dried toabout 10-20% of its original moisture necessary for the additionaloperations, is conducted under tension through a set of rolls it, thelowermost roll of which is driven in the usual manner and a pulleymounted on the shaft of the said roll and exerts on the web the pullnecessary for the passage thereof through the different devices. In theset of rolls the wall covering is furnished with a satin finish, bymeans of the smooth peripheral surfaces of the rolls pressed by theirown weight against both surfaces of the wooden wall covering that isthen wound'on a roller ll.

In the construction as shown by the drawings the drying cylinder turnson four rolls, two of which are mounted at each side of a framecontaining the means for heating the drying cylinder such as by way ofelectric resistances M or the like. The drying cylinder however may bemounted on an axle arranged in the frame.

As an alternative to applying theadhesive in moist condition it is ,alsopossible to apply the same to the paper, cardboard or other backing.

in the form of glue foil, which, for instance, may be heated by any wellknown means and unites the backing with the moist veneer and to thenpass the whole length of wall covering through the drying device and theset of rolls. To ensure the web being securely united with the veneer anendless metal cloth or screen 25, such as used in paper making machines,is guided around the drying cylinder II in any well known orconventional way, as by means of a tangentially movable tensioning roll28 and guide rolls 26 and 21 rotatably mounted in the frame of thedriving cylinder M. The heating of the drying device may be varied asdesired dependent on the degree of moisture of the veneer. For reliableoperation of the apparatus it is essential that the wall covering, forsuch time as the veneer and the backing have not become properly united,is not subjected to bends in different directions.

The finished product, as shown in Fig. 5, consists of ,the backing 29and the veneer 3|, which elements are united by a thin layer of adhesive4 30. As the adhesive is sumciently tacky to properly connect the twoelements, the veneer and the backing, before uniting the same upon thedrying cylinder the elements will not be displaced relative to eachother and no folds or creases are produced with the result that aperfectly smooth product is obtained.

I claim:

1. A method for producing wooden wall coverings and veneers consistingin supplying adhesive in an adjustable degree to a backing, regulatingthe tacky condition of the coating by varying the distance of thecoating device from the point, where the backing is united with a veneertaken from a roll,guiding the unitedveneer and backing in contact with asubstantial portion of the surface of a drying cylinder of a largediameter and pressing the united web smoothly against the cylinder, andthen rewinding it in roll form by exerting on the united end of the weba pull sufiicient to unroll the webs from their supporting rolls.

2. A method for producing wooden wall coverings and veneers consistingin supplying adhesive in an adjustable degree to a backing, regulatingthe tacky condition of the coating by varying the distance of thecoating device from the point, where the backing is united with a veneertaken from a roll and by Warming the coated backing, guiding the unitedveneer and backing in contact with a substantial portion of the surfaceof a drying cylinder of large diameter loosely and ro tatably mounted ina frame and pressing the united web smoothly against the cylinder, andthen rewinding it in roll form by exerting on the united end of the weba pull sufficient to unroll the webs from their supporting rolls.

3. An apparatus for producing wooden wall coverings and veneers,comprising a device for supplying adhesive coating to a backing takenfrom a roll, means for varying and fixing the position of said coatingdevice with. respect to means for uniting the backing with a veneertaken also from a roll, a drying cylinder of large diameter loosely androtatably mounted in a movable and fixable frame, means for guiding theunited material in contact with a substantial portion of the surface ofthe cylinder and to a set of rolls arranged to furnish the united andwarmed web with a satin finish by the pressure of the smooth peripheralsurfaces of the said rolls and exert on the web a sufficient pull toensure its passage through the aforesaid devices and over the heatedsurface of the drying cylinder, and means for rewinding the finished webin roll form.

4. An apparatus for producing wooden wall coverings and veneers,comprising a device for supplying adhesive coating to a backing takenfrom a roll, means for varying and fixing the position of said coatingdevice with respect to means for uniting the backing with a veneer takenalso from a roll, a drying cylinder of large diameter loosely androtatably mounted in a movable and fixable frame, means for guiding theunited material so as to keep the veneer side thereof in contact withthe drying cylinder, a set of rolls arranged to furnish the united andwarmed web with a satin finish by the pressure of the smooth peripheralsurfaces of the said rolls and exert on the web a suflicient' pull toensure its passage through the aforesaid devices, and over the heatedsurface of the drying cylinder, and means for rewinding the finished webin roll form.

5. An apparatus for producing wooden wall coverings and veneers,comprising a device for supplying adhesive coating to a backing takenfrom a roll, means for varying and fixing the position of said coatingdevice with respect to means for uniting the backing with a veneer takenalso from a roll, a drying cylinder of large diameter loosely androtatably mounted in a movable and fixable frame, means for guiding theunited material so as to keep the veneer side thereof in contact withthe drying cylinder, means for causing the veneer side of the united webto be pressed against the heated surface of the cylinder through a greatare, a set of rolls arranged .to furnish the united and warmed web witha satin finish by the pressure of the smooth peripheral surfaces of thesaid rolls and exert on the web a sumcient pull to ensure its passagethrough the aforesaid devices and over the heated surface of the dryingcylinder, and means for rewinding the finished web in roll form. I

6. An apparatus for producing wooden wall coverings and veneers,comprising a device for sun: plying adhesive coating to a backing takenfrom a roll, means for varying and fixing the position of said coatingdevice with respect to means for uniting the backing with a veneer takenalso from a roll, a drying cylinder of large diameter loosely androtatably mounted in a movable frame, means for heating the cylinder toan adjustable degree, means for keeping the veneer side of theunited webagainst the heated surface of the cylinder through a great arc, a set ofrolls arranged to furnish the united and warmed web with a satin finishand to exert on the web the necessary pull to ensure its passage throughthe aforesaid devices and over the heated surface of the dryingcylinder, and means for rewinding the finished web in roll form.

7. An apparatus for producing wooden wall coverings, and veneers,comprising a support mounted to roll on rails, a roll of veneer backingon the support, a device on the support for applying adhesive coating tothe backing, a rigid frame carrying a pair of rollers, a roll of veneerin the frame arranged to be united with the backing by said latterrollers, a drying cylinder of large diameter loosely and rotatablymounted in a movable frame, means for heating the cylinder to anadjustable degree, means for keeping the veneer side of the united webagainst the heatedsurface of the cylinder through a great are, a set ofrolls for furnishing the united and warmed web with a satin finish andfor exerting on the web the necessary pull to ensure its passage throughthe aforesaid devices and over the heated surface of the dryingcylinder, and means for rewinding the finished web in roll form.

8. An apparatus for producing wooden wall coverings and veneerscomprising a support mounted to roll on rails, a roll of veneer backingon the support, adhesive container on the support having at its bottomtwo rollers forming a gap of adjustable size arranged to apply adhesiveto the backing, a rigid frame carrying a pair of rollers, a roll ofveneer in the frame arranged to be united with the backing by saidlatter rollers, a drying cylinder of large diameter loosely androtatably mounted in a movable frame, means for heating the cylinder toan adjustable degree, means for keeping the veneer side of the unitedweb against the heated surface of the cylinder through a great arc, aset of rolls for furnishing the united and warmed web with a satinfinish and for exerting on the web the necessary pull to ensure itspassage through the aforesaid devices and over the heated surface of thedrying web in roll form.

